Originally Posted by
MechEngr
STS tries to ensure that the trim load is zero. This is why the Lion Air crew reported of MCAS "STS is running backwards" because it was adding to the trim load and not making it go away. The fact that an unexpected 10, 20, 30, 40, 50 ,60 pounds of trim load was on the wheel is enough to tell there is a trim problem and using the wheel trim switch countered the trim load occurred to the first Lion Air crew and the captain of the second Lion Air crew, who apparently thought using it was obvious enough he didn't mention it to the First Officer.
Or: "who for some reason didn't mention it to the F/O, possibly out of growing startle reaction, or because he thought it was obvious enough"?
Serious question, I'm not arguing that "it was obvious enough" was not the reason, rather asking whether it's a necessary inference?